Multisided platforms. as pointed by Rietveld et al. usually start with a single-use just as Amazon was a place to buy/sell used/new books until it scaled into selling close to a million unique brands. Platforms started for a singular purpose later; scaling into multi-purposes calls for certain governance limitations. https://www.pomyslnaszycie.com/us-topo-7-5-minute-map-for-booger-canyon-az-fashion/